Removing a sponge from water lowers the volume by 30 each ho

Removing a sponge from water lowers the volume by %30 each hour. If the sponge starts with volume 1000 cm^3

a) Show a formula for the sponge\'s volume after t hours.

b) Find out how long it takes for the sponge to shrink to occupy a volume of 140 cm^3.

Please show work for full rating.

v = 1000(1-0.3t); 140=1000(1-0.3t); 0.14=1-0.3t; 0.3t= 0.86 t= 2.86 hours;

$Removing a sponge from water lowers the volume by %30 each hour. If the sponge starts with volume 1000 cm^3 a) Show a formula for the sponge\'s volume after t h$

Removing a sponge from water lowers the volume by 30 each ho

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